Fluid-pressure motor.



E. W. MEREDITH.

FLUID PRESSURE MOTOR.

APPLICATION FILED JAN-7. 1915-.

Patented Nov. 2, 1915.

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FLUID PRESSURE MOTOR. APPLICATION FILED JANJ, I915.

1,1 58,525.. Patented Nov. 2, 1915.

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wihweoom EDWARD MEREDITH, 0F EEYNOLDSVI FOURTH TO EDGAR VERNON STEELLLE, PENNSYLVANIA, ASSIGNOR or oNE- L, or 'CRENSI-IAW, PENNSYLVANIA.

FLUID-PRESSURE MOTOR.

' Specification of Letters Patent.

"Patented Nov. 2, 31915.

Application filed January 7, 1915. Serial No. 848.

To oZZ whom it may concern:

Be it known that I, EDWARD W. nrri-r, a citizen of the United States ofAmerica, residing atReynoldsville, in the county of Jefferson and StateofPennsylvania, have invented certain new and useful Improvements inFluidl ressure .Motors, of which the following is a specification.

The present invention relates to improvements in fluid pressure motors,and is designed especially for use in connection with brick makingmachines.

lhe primary object of the invention is the provision of facile,efficient and economical means for returning the table of brick makingmachines to normal position after the cut in the bricks has been made,but while the invention is specifically described in connection withmachines of this character 1t will of course be understood that themotor is equally applicable for'use in connection with other machines inwhich this single acting piston motor is desired.

The invention consists essentially in certain novel combinations andarrangements of parts whereby the single acting piston is controlled andactuated to operate the motor, as will be pointed out hereinafter.

In the accompanying drawings I have illustrated one complete example ofthe physical embodiment of my inventionconstructed according to the bestmode I'have so far devised for the practical application of theprinciples of my invention, and which has proven highly satisfactory andefficient in actual practice upon brick making machines.

Figure 1 is a side elevation of a motor involving my invention. Fig. 2is a longitudinal, horizontal, sectional View of Fig. 1, showing someparts in elevation, and the motor inert at the end of its workingstroke. Fig. 3 is an end view of the motor. Fig. 4 is an enlargedhorizontal longitudinal sectional view of the controlling valve and itscasing showing the valve in position to fur- .nish steam or other motivefluid to the cylinder to move the piston. Fig. 5 is a sectional view online 5 5 of Fig. 4. Fig. 6 is a plan view of the controlling valve.

In the preferred embodiment of my invention I have illustrated thedevice as employing steam as the motive fluid, and while I shallhereinafter refer to the motive power as steam it will of course beunderstood that other power such as compressed air might also be used ifdes1red.

The piston-stem l and its piston 2 are in direct connection with thetable of the brick machine, at the threaded end 3 of the stem, and itwill of course be recognized that the table is a reciprocable one and isto be drawn to the right by. the movement of the piston to the right inits cylinder 4 and moved to the left to return the pistoinby other powermechanism forming part of the brick machine. The cylinderis of usualconstruc tion and suitable dimensions and is equipped with the heads 5and 6, the latter having a relief cock 7 opening into the cylinder toregulate a cushion of compressed fluid in the end of the cylinder. Thehead 5 vided with a stuffing box or gland 8 for the pistonstem l, andthe heads are both secured to the cylinder by usual bolts and nuts. Thepiston in thecylinder is a single acting piston, and as before statedits work-' ing stroke in the present showing of the invention is to theright, but the cylinder is provided with the usual endports 9 and 10,the former foradmission of steam and the latter for exit of steam. Thesteam for actuating the piston is controlled by the piston valve 11which is reciprocable in its casing 12 by powerisuch as -a-camor..crank: .not

shown applied at the end of the valve stem 13. The casing, at one end,is in communication with the cylinder t through port 9 by the connectingpipe 1 L which is the inlet pipe for live steam to the cylinder for operating the piston. A pipe 15 which also extends from the left end ofthe casing 12, passes around to the right end of the cylinder andcommunicates with its interior through the head 6. This pipe has a checkvalve 16 therein and the communication is provided between the casingand cylinder to prevent the formation of a vacuum at the right end ofthe cylinder when the piston moves to the left.

As clearly shown in Figs. 2 and 4: the valve casing is provided withannular recesses or ports 17 and 18, the former for the inlet pipe tothe cylinder, and the latter for exhaust from the casing, and this port18 permits passage of exhaust steam to the exhaust pipe 19 of thecasing. A third port is shown in the valve casing, indicated is pro-- atand this port is in communication with the interior. of the'cylinderthroughthe cylinder port 10.

In'Fig. 1 it will be seen that the valve 11 has a passage 21 extendingtherethrough,

- cation between the interiorof the valve casing and the interior of thevalve itself. The

I valve is also cut away and its exterior diameter reduced toform anannular space 23 within'the casing by means of which communicationbetween the inlet pipe 24 to the casing and inlet pipe'l l of thecylinder through the port 17 in the casing.

The'joperation of the motor is as follows:

Referring to Fig. 2 it will be seen that the piston 2 has finished itsworking stroke,

having'pulled the table to the right. Ad-

- mission of live steam to the casing is out off except to the space 23,and the pressure of steam throughout the cylinder pipe 14, the

centrally bored valve 11 and pipe 15 is equalized, sothat the returnreciprocation of the table will move the piston to the left in Fig.2..After the piston has been moved to theleft, the piston valve isactuated and moved to the left also, as shown in Fig. 4. Now the livesteam is admitted through space 23', port 17 and inlet pipe 14 to thecylinder at the left of the piston head, but passage of steam to theright in the casing or through the valve bore is prevented.

However, steam is exhausted from the right side of the piston throughthe ports 10, 2 0

and 18 and outlet pipe 19,but a vacuum is prevented therein by thepresence of the check valve 16 which provides for the retention of aslight pressure of steam snfiicient to prevent the vacuum. The admission of fluid pressure to the left of the piston of course moves it tothe right and thus the working stroke of the motor is accomplished. Thecushion at the right end of the cylinder a may be regulated by theposition of the cock7, and this may be determined by the requirements ofdifferent conditions.

What I claim is 1. In a single acting motor, the combination with itscylinder and its piston, of a casing having a valve therein and a motivefluid inlet, ports at the ends of the cylinder in communication with theports in the casing, said valve having means for equalizing pressure inthe cylinder upon the return stroke of the piston and said valve adaptedto admit motive fluid to the cylinder at one end and exhaust the samefrom the cylinder at its other end.

2'. In a single acting fluid pressure motor, the combination with acylinder and its piston, of a casing having a motive fluid inlet,exhaust port and end ports communi eating with said cylinder, a pistonvalve controlling said ports and having a passage therethrough, wherebymotive fluid may be furnished to one side of the piston, and exhaustfluid be withdrawn from the other side of the piston through saidpassage, and the pressure equalized in the cylinder on the return strokeof the piston.

In testimony whereof I afiix my signature in presence of two witnesses.

EDWVARD W. MEREDITH.

Witnesses EDGAR V. STEELL, GLENN BnNMNGEs.

- Copies .of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. C.

